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专项练习专项练习————句型转句型转换换陈述句肯定句否定句疑问句一般疑问句特殊疑问句一.肯定句变否定句1.1)Iamastudent.Iamnotastudent.2)Theyareblue.Theyaren’tblue.3)HeisKangkang.Heisn’tKangkang.句子中有be动词，在be动词后加not。谓语是动词原形，在动词前加don’t。2.1)Ihaveabook.Idon’thaveabook.2)TheylikeChinese.Theydon’tlikeChinese.3)WecomefromChina.Wedon’tcomefromChina.3.谓语动词是第三人称单数，在动词前加doesn’t，把动词还原成原形。1)Shehasasmallmouth.Shedoesn’thaveasmallmouth.2)MarialikesChina.Mariadoesn’tlikeChina.3)JanecomesfromtheU.S.A.Janedoesn’tcomefromtheU.S.A.练习：将下列句子变成否定句。练习：将下列句子变成否定句。1.Iamateacher.I1.Iamateacher.Iateacher.ateacher.2.Wearestudents.We2.Wearestudents.Westudents.students.3.Janeisagirl.Jane3.Janeisagirl.Janeagirl.agirl.4.TheylikeEnglish.They4.TheylikeEnglish.TheylikeChineselikeChinese5.IcomefromChina.I5.IcomefromChina.IcomefromChina.comefromChina.6.HelikesChinese.He6.HelikesChinese.HelikeChinese.likeChinese.7.MariacomesfromCuba.7.MariacomesfromCuba.MariaMariacomefromCuba.comefromCuba.8.WeknowMaria.We8.WeknowMaria.WeknowMaria.knowMaria.amnotaren’tisn’tisn’tdon’tdon’tdon’tdon’tdoesn’tdoesn’tdoesn’tdoesn’tdon’tdon’t二.肯定句变一般疑问句1)Iamastudent.Areyouastudent?2)Theyareblue.Aretheyblue?3)HeisKangkang.IsheKangkang?1.句子中有be动词,把be提到句首.第一人称变成第二人称2.谓语是动词原形，在句首加Do。1)Ihaveabook.Doyouhaveabook?2)TheylikeChinese.DotheylikeChinese?3)WecomefromChina.DoyoucomefromChina?3.谓语动词是第三人称单数，在句首加Does，动词用原形。1)Shehasasmallmouth.Doesshehaveasmallmouth?2)MarialikesChina.DoesMarialikeChina?3)JanecomesfromtheU.S.A.DoesJanecomefromtheU.S.A?4)SheknowsMaria.DoessheknowMaria?练习:将下列句子变成一般疑问句。1.Iamateacher.ateacher?2.Theyarestudents.Students?3.Janeisagirl.agirl?4.TheylikeEnglish.theylikeEnglish?5.IcomefromChina.youcomefromChina?6.HelikesChinese.heChinese?7.MariacomesfromCuba.MariafromCuba?8.WespeakChinese.youChinese?AreyouAretheyIsJaneDoDoDoeslikeDoescomeDospeak三.一般疑问句做肯定,否定回答AreyouMaria?肯定回答：Yes,主+助/be动词.否定回答:No,主+助/be动词+not.肯定回答：Yes,Iam.否定回答：No,I’mnot.2.答语要与问句的be动词或助动词保持一致.1)Areyouastudent?肯:Yes,Iam.否：No,I’mnot.2)IsheKangkang?肯：Yes，heis.否：No，heisn’t.3)DotheylikeChinese?肯：Yes,theydo.否：No,theydon’t.4)Doesshehaveasmallmouth?肯：Yes,shedoes.否：No,shedoesn’t.3.答语和问句中的主语保持一致。（必须用主格，注意变化）1)IsJanefromtheU.S.A?2)Doesyourbrotherlikeoranges?3)DoJaneandMarialikeChina?4)Isthisaruler?肯:Yes,sheis.否:No，sheisn’t.肯:Yes,hedoes.否:No,hedoesn’t.肯:Yes,theydo.否:No,theydon’t.肯:Yes,itis.否：No，itisn’t.5)Isthatadesk?9)Isitanorange?7)Arethosepencils?8)Aretheyerasers?6)Arethesebooks?肯：Yes，itis.否：No，itisn’t.肯：Yes，theyare.否：No，theyaren’t.肯：Yes，theyare.否：No，theyaren’t.肯：Yes,theyare.否：No，theyaren’t.肯：Yes,itis.否：No，itisn’t.练习：给下列句子做肯定回答或否定回答。练习：给下列句子做肯定回答或否定回答。1.Areyouastudent?1.Areyouastudent?Yes,Yes,.No,.No,..2.DotheylikeEnglish?2.DotheylikeEnglish?Yes,Yes,.No,.No,..3.IsJaneagirl?3.IsJaneagirl?Yes,Yes,.No,.No,..4.DoesMarialikeChina?4.DoesMarialikeChina?Yes,Yes,.No,.No,..IIamamII’’mmtheytheynotnottheytheydododondon’’ttshesheisisshesheisnisn’’ttsheshedoesdoessheshedoesndoesn’’tthe5.IsKangkangastudent?...